. NET design mode (Singleton Mode)

. NET design mode (Singleton Mode)

1. In Singleton mode, only one object can be added to a class

2. Example: Resource Manager, File Manager, earth, etc;

3. Create a ticket:

(1) Create an Earth class

Class Earth

{

Public Earth ()

{

}

}

(2) privatize Constructors

Class Earth

{

Private Earth ()

{

}

}

(3) declare a static private field and initialize an instance.

Class Earth

{

Private static Earth instance = new Earth ();

Private Earth ()

{

}

}

(4) Compile a static method or attribute to return a unique instance.

Class Earth

{

Private static Earth instance = new Earth ();

Public static Earth GetEarth ()

{

Return instance;

}

Private Earth ()

{

}

}